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3 <br />PW <br />r <br />i. E1 Kil E I - rF L, IN, R ASSO CIAl t File No. S-1147-19 � <br />July 21, 1972 <br />PAGE TWO <br />extended to depths of 30 feet below existing ground surface. <br />A representative of our firm directed the drilling operations <br />and maintained a continuous log of the.soils encountered <br />in the borings. Bag samples and a few relatively undisturbed <br />core samples of the soils were obtained for visual examination, <br />classification and laboratory testing. At the completion of <br />the borings, 2 -inch diameter perforated observation pipes <br />were i.nstalled.in the borings. <br />SOIL CONDITIONS <br />The soil conditions encountered at the locations of the <br />two borings were as follows <br />In Boring 1, the surface soil consists of a black clay <br />stratum approximately 2-112 fest in thickness. This is <br />t e stiff <br />underlain approximate an approxzate 4 -foot thick stratum of v <br />dark -brown silty clay which is partially cemented. This is <br />in turn underlain by a 2 -foot thick stratum of red -brown <br />clayey sand. Below the clayey sand, strata of sandy and <br />silty clay were encountered to an approximate 25 -foot depth. <br />The clays are underlain b tan sandy silt to the depth <br />Y <br />explored. In general, these soils are medium -stiff to stiff. <br />In Boring 2, the surface soil also consists of black <br />:. clay. This is underlain by a 2 -foot thick stratum of stiff <br />grey -brown clayey silt. These soils are underlain by strata <br />,F <br />